“Medicare supplement policy” means an individual or group accident and sickness insurance policy or certificate, or a health maintenance organization subscription contract or evidence of coverage, issued or issued for delivery in this Commonwealth which is (i) designed primarily to supplement Medicare by providing benefits for payment of hospital, medical or surgical expenses, or (ii) advertised, marketed or otherwise purported to be a supplement to Medicare. For group policies, the term does not include a policy or contract of one or more employers or labor organizations, or of the trustees of a fund established by one or more employers or labor organizations, or a combination of employees and labor organizations, for employees, former employees, or a combination of employees and labor organizations or for members or former members, or combination thereof, of the labor organizations.